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TLSI - Vcxo Clock Generator

Numéro de référence T73227
Description Vcxo Clock Generator
Fabricant TLSI 
Logo TLSI 





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T73227 fiche technique
T73227
27 MHz VCXO Clock Generator IC
October 2002
1.0 Features
One-chip tunable voltage controlled crystal oscillator
(VCXO) allows precise system frequency tuning
3.3V operation
8 pin SOIC and MSOP packages
Uses inexpensive 20pF pullable crystals with no
external capacitors required.
12mA drive capability at TTL levels
2.0 Applications
Set-top boxes
MPEG Video clock source
Oscillator replacement
Figure 1: Block Diagram
3.0 Description
The T73227 is a single-chip, low-jitter Voltage-Controlled-
Crystal-Oscillator. The device accepts a 27 MHz, 20 pF
crystal, and produces a low jitter output at the same fre-
quency. A 0 to 3.0V control signal is used to fine tune the
output clock frequency in the ±100ppm range. This finds
use in systems that have frequency matching require-
ments, such as digital satellite receivers.
VDD1
VDD2
VIN
27 MHz
Pullable
Crystal
X2
X1
Load Cap Control
Load
Caps
Oscillator
GND1
Output
Buffer
GND2
CLK
ISO9001
This document contains information on a preproduction product. Specifications and information herein are subject to change without notice.
10.29.02

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